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Regenerative Furnace,


although the mixture enters at 700 F, the products of comhustion
pass to the chimney at 200 or 300 F. In a short time the bricks
become white hot, and the valves A G are then reversed as is
shown at v1 and v2, the former being the position for the action
already mentioned, and the latter allowing the gas and air to

? ^g^e/te^xg^

. 9 

enter first the left Me of the furnace and leave on the opposite
side. Doing so, it is evident that the heat which was absorbed in
the last operation by the regenerators R R is now taken up again
bj the entering gases, and the bricks rr, in their turn receive the

rejected heat

By this means a large amount of heat is made useful which